private static bool ConvertedHasEqual(BinaryOperatorKind oldOperatorKind, BoundNode node, out TypeSymbol type)
{
type = null;
if (node.Kind != BoundKind.Conversion)
{
return(false);
}
var conv = (BoundConversion)node;
if (conv.ExplicitCastInCode)
{
return(false);
}
NamedTypeSymbol nt = conv.Operand.Type as NamedTypeSymbol;
if ((object)nt == null || !nt.IsReferenceType || nt.IsInterface)
{
return(false);
}
string opName = (oldOperatorKind == BinaryOperatorKind.ObjectEqual) ? WellKnownMemberNames.EqualityOperatorName : WellKnownMemberNames.InequalityOperatorName;
for (var t = nt; (object)t != null; t = t.BaseTypeNoUseSiteDiagnostics)
{
foreach (var sym in t.GetMembers(opName))
{
MethodSymbol op = sym as MethodSymbol;
if ((object)op == null || op.MethodKind != MethodKind.UserDefinedOperator)
{
continue;
}
var parameters = op.GetParameters();
if (parameters.Length == 2 && TypeSymbol.Equals(parameters[0].Type, t, TypeCompareKind.ConsiderEverything2) && TypeSymbol.Equals(parameters[1].Type, t, TypeCompareKind.ConsiderEverything2))
{
type = t;
return(true);
}
}
}
return(false);
}
